WORCESTER — An officer on a police motorcycle was injured this afternoon when he collided with a car on School Street in downtown Worcester.

The driver of the car was pulling away from an on-street parking spot at the time of the collision, according to police.

The accident occurred about 12:30 p.m. near the Worcester County Courthouse. The officer was conscious and alert when he was moved into an ambulance before being rushed to a hospital.

A police spokeswoman said the officer suffered a leg and shoulder injury and a laceration to his head. The officer is not being publicly identified.

The driver of the 2006 Toyota was not hurt. He has been identified as a 71-year-old Shrewsbury man. Police said he refused medical treatment on scene.

Apparently the car was parked facing west and the driver was trying to make a U-turn to go east. The motorcycle hit the driver's side door, the department spokeswoman said. The officer, who was on his way to the courthouse, tried to avoid the collision.

The case remains under investigation. Witnesses were interviewed at the scene.